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| a form of oxygen that combines three oxygen atoms into each molecule |
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| the bottom layer, where temperature decreases with an increase in altitude |
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| the temperature remains constant, above troposphere |
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| first "official" day of summer June 21 or 22 |
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| first "official" day of winter December 21 or 22 |
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| start of automn September 22 or 23 |
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| start of spring for northern hemisphere March 21 or 22 |
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| a measure of the average kinetic energy of the individual atoms or molecules in a substance |
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| the transfer of heat through matter by molecular activity |
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| transfer of heat by mass movement or circulation within a substance |
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| occurs when an electromagnetic wave bounces off an object |
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| produces a larger number of weaker rays that travel in different directions |
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| lines that connect points that have the same temperature |
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